Eastcoast SHO
SHO
...and what should happen when i unplug it?
What Is this.....
- Thread starter Eastcoast SHO
- Start date
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SHObill
'The Collector'
Thats your TPS = Throttle Position Sensor
If you unplug while idle, may stumble or stall.
Idle will be erratic when you apply gas.
If you unplug while idle, may stumble or stall.
Idle will be erratic when you apply gas.
Eastcoast SHO
SHO
i unplugged it and no change happened
Izzmo
SHO Enthusiast
The same happens for me, but it shouldn't stall.
It should stall if you unplug the IAC... the computer doesn't rely on the TPS readings as it does the IAC readings for operation, so when you unplug it or it starts malfunctioning, I think it reverts to some sort of default.
It should stall if you unplug the IAC... the computer doesn't rely on the TPS readings as it does the IAC readings for operation, so when you unplug it or it starts malfunctioning, I think it reverts to some sort of default.
Eastcoast SHO
SHO
could this be all of my problems? or no
nothingtoseehere
SHO Member
- Joined
- Apr 23, 2001
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What are your problems?
Eastcoast SHO
SHO
codes P0171,P0172,P0304 all of my problems were stated in this post http://www.shoforum.com/showthread.php?t=107247
ThatShoGuy
SHO Member
304 is a coil or somthing with cylinder 4 i would start with fixing the weak or non working coils
i would assume there is more bad coils that aint pulling codes..
maybe you have tried this??
Eastcoast SHO
SHO
yes i tried that, like stated in the other post i have done everything just trying to get to the root now
For reference, the IAC (Idle Air Control) is the connector directly above the TPS in your picture.
The misfire (P0304) could lead to the 'too rich' code (P0172). No or incomplete ignition = rich mixture pushed past the O2 sensor. Swap that coil out with one on the front bank and see if the code follows the coil. If it does you can just replace that coil - and it'll be on the front bank now so it'll only take a few minutes.
You now have the pleasure of removing the surge tank as cylinder 4 is on the bank near the firewall. Get some swiveling or stubby wrenches in 12mm (and in my case, one bolt is 13mm, the one with the ground strap on it) sizes for the brackets on the back side of the surge tank.
Off topic: WTF is going on with your positive battery terminal?
The misfire (P0304) could lead to the 'too rich' code (P0172). No or incomplete ignition = rich mixture pushed past the O2 sensor. Swap that coil out with one on the front bank and see if the code follows the coil. If it does you can just replace that coil - and it'll be on the front bank now so it'll only take a few minutes.
You now have the pleasure of removing the surge tank as cylinder 4 is on the bank near the firewall. Get some swiveling or stubby wrenches in 12mm (and in my case, one bolt is 13mm, the one with the ground strap on it) sizes for the brackets on the back side of the surge tank.
Off topic: WTF is going on with your positive battery terminal?
Eastcoast SHO
SHO
as stated before i did all this already when i had a misfire on three, now its on four. there used to be an aftermarket amp and radio before
Izzmo
SHO Enthusiast
For reference and us (like me) who don't want to go back and forth between topics... did you actually replace any of the coils when you took off the surge tank?
ThatShoGuy
SHO Member
thats what i was getting at switching them around might not solve the issue tho NEW coils could. if your car has alot of miles and is still on its stock set its worth a try.
i assume you have looked at the wiring under the plenum really well also..
sorry to ask you these i am to lazy to read the thread..
Eastcoast SHO
SHO
ok, the rears originally had a misfire on 3, replace all four with brand new ones still had misfire on 3, then replaced fuel injectors, reinsulated rear cp wire harness, did compression test(was fine), then switches #3 cp with #7 cp now showing misfire on 4
Izzmo
SHO Enthusiast
You replaced the fuel injectors? Crap.. that must have cost you a pretty penny.
As 'ThatSHOGuy' said, did you look at the wiring of the coils to make sure nothing was bare wire/cut/spliced? If you haven't done already, I would insulate the wire with some new loom/electrical tape.
Also, might be a stupid question, but did you check the spark plug(s) to make sure they are sparking?
As 'ThatSHOGuy' said, did you look at the wiring of the coils to make sure nothing was bare wire/cut/spliced? If you haven't done already, I would insulate the wire with some new loom/electrical tape.
Also, might be a stupid question, but did you check the spark plug(s) to make sure they are sparking?
Eastcoast SHO
SHO
already insulated back wires, new spark plugs but didnt check for spark as the misfire moved to #1 today
Izzmo
SHO Enthusiast
Are you certain it is actually a misfire? Could it be a late fire? Did you check the spark plug gap?
Eastcoast SHO
SHO
correctly gapped them when installed, my code reader says P0301
ThatShoGuy
SHO Member
i assume your not moving the coil right?
if your codes keep jumping like that i was assume the coils are crapping out and the car keeps picking up different coils crapping out at different times.
maybe im wrong.
luigisho
SHO Member
Any fouled plugs with oil on them? I have that problem on my '97. Haven't got around to new gaskets/seals yet.
